Five Dallas police officers have been killed and seven others wounded in a sniper ambush that began Thursday night and ended with a bomb squad robot killing a gunman after negotiations failed.
The shooter has been identified by authorities as 25-year-old military veteran Micah Johnson. Investigators are looking into additional suspects.
Two civilians were also harmed during the attack.
The gunfire was brought about following the online release of two African-American men being shot by police in Louisiana and Minnesota. This prompted protest across the United States over use of police force.
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